From: James Olin Oden <james.oden@xxxxxxxxx> > Any idea what the BIOS actually does to enable "linux" memory mode? > That is what registers are poked in the MCH (I assume it would be the > MCH)? Do you think this could be done post bios by say a boot > loader? It completely _breaks_ Intel GTL compatibility at the APIC level IIRC. You can _not_ run Windows on it or a "normal" Linux kernel. From: Feizhou <feizhou@xxxxxxxxxxxx> > http://marc.theaimsgroup.com/?l=linux-kernel&m=107759901509280&w=2 > The Linux option in bios is mentioned here. > http://marc.theaimsgroup.com/?l=linux-kernel&m=107757492125437&w=2 > I think what Bryan here is talking about is called IOMMU by the kernel guys. No, that was already at the bottom of the link I sent before. I was referring to _another_ thread where a gentlemen from AMD (with an amd.com address) was talking about the hack that enables this. It is a little known feature because only 2-3 mainboards have the BIOS hack as an option. -- Bryan J. Smith mailto:b.j.smith@xxxxxxxx